The base is 5 because when you divide 31.5 by 6.3 it's 5
        
                    
             
        
        
        
Answer: The manager should sell the chair for $1740. 
Step-by-step explanation:
45% of 1200       Solve this to find the amount increase 
0.45 * 1200 =  540      Now add this amount to find the price. 
$1200 + $540 = $1740 
or  you could do it this way 
100% + 45% =  145% 
145% of 1200 =?
1.45 * 1200 = 1740
 
        
             
        
        
        
Answer:
X = -20
Step-by-step explanation:
X = -2(6+4)
             ^ add 6 and 4 together first because they are in parentheses
-2(10)
    ^ this parenthesis means you want to multiply -2 and 10
because 2 x 10 = 20
that must mean -2 x 10 = -20
therefore, the value of X is -20
X= -20